After orthodontic treatment, as long as the teeth are maintained as prescribed, they usually do not bounce back to their original shape. One of the foundations of orthodontics is the theory of adaptive remodeling of the alveolar bone. While the teeth move under force, the alveolar bone resorbs and rebuilds, thus adapting to the reconstruction of the oral and maxillary occlusal system. Therefore, it is necessary to maintain after orthodontic treatment to maintain the stability of the state, usually 1~2 years. The duration of maintenance varies from patient to patient depending on the degree and type of deformity, so it is recommended to follow the doctor’s instructions for maintenance, and generally will not rebound to the original state. It is important to note that in some cases of malocclusion that are prone to recurrence, minor recurrence is normal and therefore the practice of overcorrection exists; it is recommended to go to a regular hospital stomatology department.